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基于镍钛合金丝的航空发动机碰摩故障缓解方案研究

Study on a Fault Mitigation Scheme for Rub-Impact of an Aero-Engine Based on NiTi Wires.

作者信息

Pan Qiang, He Tian, Liu Wendong, Liu Xiaofeng, Chen Haibing

机构信息

School of Transportation Science and Engineering, Beihang University, Beijing 100191, China.

AECC Shenyang Engine Research Institute, Shenyang 110000, China.

出版信息

Sensors (Basel). 2022 Feb 24;22(5):1796. doi: 10.3390/s22051796.

DOI:10.3390/s22051796
PMID:35270945
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8914907/
Abstract

The aim of this study was to solve the frequently occurring rotor-stator rub-impact fault in aero-engines without causing a significant reduction in efficiency. We proposed a fault mitigation scheme, using shape memory alloy (SMA) wire, whereby the tip clearance between the rotor and the stator is adjusted. In this scheme, an acoustic emission (AE) sensor is utilized to monitor the rub-impact fault. An active control actuator is designed with pre-strained two-way SMA wires, driven by an electric current via an Arduino control board, to mitigate the rub-impact fault once it occurs. In order to investigate the feasibility of the proposed scheme, a series of tests on the material properties of NiTi wires, including heating response rate, ultimate strain, free recovery rate, and restoring force, were carried out. A prototype of the actuator was designed, manufactured, and tested under various conditions. The experimental result verifies that the proposed scheme has the potential to mitigate or eliminate the rotor-stator rub-impact fault in aero-engines.

摘要

本研究的目的是解决航空发动机中频繁出现的转子-定子碰摩故障，同时又不会导致效率显著降低。我们提出了一种故障缓解方案，使用形状记忆合金（SMA）丝来调整转子与定子之间的叶尖间隙。在该方案中，利用声发射（AE）传感器监测碰摩故障。设计了一种主动控制执行器，它由预应变的双向SMA丝构成，通过Arduino控制板由电流驱动，一旦碰摩故障发生，即可缓解该故障。为了研究所提方案的可行性，对镍钛丝的材料性能进行了一系列测试，包括加热响应速率、极限应变、自由恢复速率和恢复力。设计、制造了执行器原型，并在各种条件下进行了测试。实验结果验证了所提方案具有缓解或消除航空发动机转子-定子碰摩故障的潜力。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/edd0/8914907/24106ddb6f51/sensors-22-01796-g015.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/edd0/8914907/91f839851412/sensors-22-01796-g011.jpg
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